One problem related to axle shaft seal has been reported for the 2002 Mercury Mountaineer. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Mercury Mountaineer based on all problems reported for the 2002 Mountaineer.
Leak noticed around rear differential at 49,000 miles. Dx at 54,000 mi - leaking axle shaft seals. Replaced selas. Rear diff. Still whines under load.